let logoff_vm = new Vue({
    el: "form,div",
    data: {},
    methods: {
        logoff: function () {
            if (confirm("你确定要注销吗?")) {
                axios.get("/user/logoff").then(function () {
                    alert("注销成功!")
                    location.href = "/";
                })
            }
        }
    }
})